Home / 143,063.09-197,436.29-79,400.88

Finding the Fourth Proportional to 143,063.09, 197,436.29 and 79,400.88

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Solution

The fourth proportional to 143,063.09, 197,436.29 and 79,400.88 is: 109,578.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,063.09 : 197,436.29 = 79,400.88 : x
  2. Step 2: Convert to fraction form
    143,063.09/197,436.29 = 79,400.88/x
  3. Step 3: Cross multiply
    143,063.09x = 197,436.29 × 79,400.88
  4. Step 4: Simplify right side
    143,063.09x = 15,676,615,328.22
  5. Step 5: Solve for x
    x = 15,676,615,328.22/143,063.09
  6. Step 6: Final answer
    x = 109,578.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.